What do you do when your toddler hits you?

My son is 2 years old and he has started hitting my husband and I when he is angry or frustrated. Mostly slapping us in the face.

Most of the time I grab his hand and say “we don’t hit” and sometimes I ignore it, because I think he wants any kind of reaction. It just feels so unnatural to ignore someone hitting you in the face.

What works for you? This phase is really frustrating.